Answer Key
UPSC Prelims 2019, GS Paper 1: Answer Key and Subject-Wise Analysis
100 questions, cross-verified against the official UPSC answer key. Conducted 2 June 2019 (Series C, booklet code BKL-F-GHP).
Subject distribution
Counted directly from the question bank, not estimated, so these numbers match exactly what you will see if you filter the practice list yourself.
| Subject | Questions | Share |
|---|---|---|
| Economy | 30 | 30% |
| Environment | 18 | 18% |
| Science & Technology | 14 | 14% |
| Polity | 13 | 13% |
| History | 11 | 11% |
| Geography | 7 | 7% |
| Art & Culture | 4 | 4% |
| Current Affairs | 3 | 3% |
Difficulty breakdown
Easy
14
Medium
50
Hard
36
Free
12
free to answer
Member
88
answer gated behind sign-in
Standout questions
These made aspirants pause, either because they were unusually difficult, unusually novel, or because they signal a shift in how UPSC is framing questions.
Q9 · Science & Technology
CRISPR Cas9 Gene Editing
CRISPR Cas9 was still a genuinely emerging topic in 2019, well before it became a recurring current-affairs staple in later papers. A good early marker of how fast biotechnology moves into the syllabus once it starts making real-world headlines.
Practise this question →Q70 · Environment
Wetlands Conservation, Ramsar Convention and Wetland Rules, 2010
A precision trap. Wetland Rules, 2010 are genuinely inspired by Ramsar's spirit, but they are India's own domestic law under the Environment (Protection) Act, 1986, not a rule framed literally on Ramsar's own recommendations. The kind of distinction that separates a careful reader from a confident guesser.
Practise this question →Q41 · Polity
Particularly Vulnerable Tribal Groups (PVTGs)
Particularly Vulnerable Tribal Groups sit at the intersection of two subjects prep often treats separately, tribal welfare policy and demography, and this question rewards knowing the actual official criteria UPSC uses to classify a group as a PVTG rather than a general sense of tribal disadvantage.
Practise this question →Q90 · Geography
Physical Geography, Earth's Motions, Solstices and Circles of Latitude
Solstices and circles of latitude are basic-seeming physical geography that a surprising number of aspirants get backwards under exam pressure, exactly the kind of foundational fact this paper chose to test directly rather than assume was already secure.
Practise this question →Q97 · History
Harappan Civilisation, Site Identification
Harappan site identification rewards knowing specific excavated locations, not just the civilisation's general story, the gap between reading about the Indus Valley and being able to place its actual sites on a map.
Practise this question →Key takeaways
Economy was the single heaviest subject by a wide margin, 30 of 100 questions, nearly a third of the paper, with Environment second at 18. A year this Economy heavy rewards real depth in banking, monetary policy and agricultural economics over broad general awareness.
The paper split cleanly along thematic lines: the first half (Q1-50) leaned almost entirely Economy and Science & Technology with zero History, Geography or Art & Culture questions, and the second half (Q51-100) carried all of that subject weight instead. Don't assume even coverage within a single paper, UPSC often clusters by theme across its two halves.
Several pair-matching and 'how many are correctly matched' questions ran through this paper, in Geography and History especially, rewarding aspirants who verify each individual pair or statement rather than judging the set as a whole.
Science & Technology questions here leaned heavily on very recent developments (CRISPR, RNA interference, gravitational wave detection, digital signatures), a reminder that this subject rewards staying current, not just revising a fixed static syllabus.